Rubber stamp



FIG. 1 is a front elevational view of a rubber stamp showing our new design.

FIG. 2 is a left side elevational view of the rubber stamp.

FIG. 3 is a top plan view of the rubber stamp.

FIG. 4 is a right side elevational view of the rubber stamp.

FIG. 5 is a bottom plan view of the rubber stamp. 

The ornamental design for a rubber stamp, as shown. 